Soaking your feet in high water temperature will lead to red spots and wrinkles on your stomach.
Red blood spots are usually caused by skin irritation, capillary dilation and congestion, or rupture. Some people are naturally sensitive to skin, and red blood spots will appear when they encounter irritants such as frozen and spicy skin, but they will disappear after a while, so don't worry too much. I suggest you keep a good mood, do more proper exercise and eat more fresh fruits and vegetables.